101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
#pragma once
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#include <QWidget>
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#include <memory>
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#include "ChunkCache.h"
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#include "ChunkSource.h"
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class BiomeView :
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public QWidget
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{
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typedef QWidget super;
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Q_OBJECT
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public:
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explicit BiomeView(QWidget * parent = NULL);
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QSize minimumSizeHint() const;
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QSize sizeHint() const;
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/** Replaces the chunk source used by the biome view to get the chunk biome data.
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The entire view is then invalidated and regenerated. */
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void setChunkSource(std::shared_ptr<ChunkSource> a_ChunkSource);
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signals:
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public slots:
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/** Redraw the entire widget area. */
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void redraw();
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/** A specified chunk has become available, redraw it. */
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void chunkAvailable(int a_ChunkX, int a_ChunkZ);
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/** Reloads the current chunk source and redraws the entire workspace. */
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void reload();
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protected:
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double m_X, m_Z;
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double m_Zoom;
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/** Cache for the loaded chunk data. */
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ChunkCache m_Cache;
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/** The entire view's contents in an offscreen image. */
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QImage m_Image;
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/** Coords of the mouse for the previous position, used while dragging. */
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int m_LastX, m_LastY;
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/** Set to true when the user has a mouse button depressed, and is dragging the view. */
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bool m_IsMouseDragging;
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/** Accumulator for the mouse wheel's delta. When the accumulator hits a threshold, the view zooms. */
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int m_MouseWheelDelta;
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/** Data used for rendering a chunk that hasn't been loaded yet */
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uchar m_EmptyChunkImage[16 * 16 * 4];
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/** Draws the specified chunk into m_Image */
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void drawChunk(int a_ChunkX, int a_ChunkZ);
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/** Returns true iff the biome view has been initialized to contain proper biome data. */
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bool hasData(void) const { return m_Cache.hasData(); }
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/** Called when the widget is resized */
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virtual void resizeEvent(QResizeEvent *) override;
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/** Paints the entire widget */
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virtual void paintEvent(QPaintEvent *) override;
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/** Called when the user presses any mouse button. */
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virtual void mousePressEvent(QMouseEvent * a_Event);
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/** Called when the user moves the mouse. */
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virtual void mouseMoveEvent(QMouseEvent * a_Event);
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/** Called when the user releases a previously held mouse button. */
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virtual void mouseReleaseEvent(QMouseEvent * a_Event) override;
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/** Called when the user rotates the mouse wheel. */
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virtual void wheelEvent(QWheelEvent * a_Event) override;
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/** Called when the user presses a key. */
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virtual void keyPressEvent(QKeyEvent * a_Event) override;
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/** Decreases the zoom level and queues a redraw. */
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void decreaseZoom();
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/** Increases the zoom level and queues a redraw. */
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void increaseZoom();
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};
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